Variable-speed mechanism.



PATENTED JAN. 8, 1907.

APPLICATION FILED JULY 17, 1906.

2 SHEETS-SHEET 1.

awawtoz r h l t I Ill/147111147 20? 1%. 840,671. PATENTED JAN. 8, 1907.

' L. THIEL.

VARIABLE SPEED MECHANISM. 4

APPLICATION FILED JULY 17, 1906.

2 SHEETS-SHEET 2.

' V G v E E a y Un s earns PATT chino.

LOUIS THIEL, OlNCINNATl, OHIO, ASSIGNOR TO THE OINGlNNATI MILL ING MACHINE COMPANYiOF OlNOlNNATI, OHIO, A CORPORATION.

vsJnuneLe sseen MECHANISM.

Specification of Letters Patent.

Patented J an. 8, 1907.

= To all whom it may concern.-

Be it known that I,.LOUIS'THIEL, a citizen of the United States, residing at Cincinnati, in the county of Hamilton and State of Ohio, have invented certain new and useful lin provements in Variable-Speed Mechanism, of which they following is a specification.

My invention relates to variable-speed mechanism used in connection with machinetools. l g'lhe principal object of my inventionrelates to the shifting of tumbler mechanism for accomplishing changes of speed from a driving to a driven shaft.

The features of the invention will be more fully set forth in the description of the acc0mpanying drawings, forming apart of this specification, in which Figure V1 is a front elevation of m improved speed-box as applied to a millingm'achlne. Fig. 2 is a side elevation thereof.

- Fig. 3 is an enlarged section on line a; 9:, Fig.

2. r Fig. 5 1s a section on line 210,.Fig. 3. Fig. 6

Fig. 4 is a section on line 'w w, Fig. 3.

is a section on line 22, Fig. 3. Fig. 7 is an enlarged section on line a, Fig. 1.. Fig. 8 illustrates the general organization of the shafts and gearing.

A 1 represents a box inclosing the parts, to be hereinafter described.

2 represents the driving-shaft, suitably journaled in bearings inthe box, having thereon a driving-wheel 3. (See also Fig. 5.) This-wheel 3 is shown as a sprocket-wheel and is driven by a sprocket-chain (not shown) from the main drive of the machine.

On shaft 2 is mounted a sleeve 4, adapted to turn with and slide on shaft 2, saidsleeve being provided with two gears 5 6 of different diameter.

' 7 represents a second shaft journaled in the box, and which for convenience I will calla cone-shaft. On shaft 7 is fixed a gear-wheel 8, having an elongated sleeve 9,

upon which sleeve are fixed the successive gear-wheels of the cone 101112 13 14, respectively. v

15 represents a sleeve fixed to shaft 7,.

having the gear-teeth 16 and 17 cut on each end thereof, and 18; represents a gear-wheel fixed to the sleeve 15.

The sleeve "4 maybe slid so as to engage the gear-wheel 6 with thecone gear-wheel 14 for one rate of drive and alsaadapted to be slidito intermesh the gear-wheel 5 with the gear-wheel 18 for another change of speed to i the cone. To slide sleeve 4, l journal a stud shaft 19 in bearings formed in the casing or box 1 and in bearings formed in an indexplate 20, fixed-to the ody of thet niachine, wi thin which tli Shaft 19 is provided with a crank-handle 21, having detent mechanism 22 to engage segmentally-arranged orifices 23 in the plate 20. On the inner end of shaft 19 an arm is'fixed having a fork 25'swiveled in its free end.

The box 1 is provided with an opening 26, through which the fork 25 projects, the inner end of the fork straddling. the gear-wheel 5, so as to shift the sleeve 4 w th its contained gears to different positions. I In order to utilize the shifting of sleeve 4 e box or casing 1' is secured.

to'give another change of speed to the cone of shaft 7, I provide a stud-shaft 27, upon which are fixed two gear-wheels of different diame; ter 28 29, respectively, adapted to rotate together.

Gear-wheel 28 intermeshes with a pinion 30 on a stud-shaft 31, and pinion 30. intermeshing with the gear-wheel 16 on the cone-shaftl7. Therefore if sleeve 4 be shifted still farther to the left, so as to disengage gear-Wheel 5 from the gear wheel 18, gearwheel 5 can 'be interme'shed with gear-Wheel 29 and a third change of speed imparted from shaft 2 to the cone-shaft 7.

32 represents a tumblerdrame provided with sleeve projections 33 34 at each end, projecting through and journaling in the box. 35' represents a driven shaft journaled within the sleeve projections 33 34 of the "tumbler-frame 32.

36 represents a pinion slidably mounted upon shaft 35, adapted to rotate the same,- said pinion being provided with a sleeve 37,

upon'which a shifting sleeve 38 is fixed.

39 represents a tumbler-shaft fixed to the limbs of the tumbler-frame32, upon which is loosely mounted the gear-wheel 40, intermeshing with the pinion 36.

41 represents a plate fixed to the pinionv 36,

- forming means whereby when thepinion 36 is shifted to the right or left it, together with the shoulder formed by the sleeve 38, will carry gear 40 {with pinion 36.

Mechanism for sliding. the tumbler-gears 36 and 40 consist of the following instrumen talities 42;represents a rock-shaft iournaledin the botthm of the box and index-plate,

roe

- 48 of the indeX-plete'EO.

havingi.&n,arm*fi3 to one end thereof said arm 43 being provided with a plate 44, '(seedottedl lines, Fig, 3,) swiveled in the free end 'of the arrn' 43 and en aging into the groove 45of'the sleeve 38. pon the op'posite end of the shaft 42 a cranl rhandle 46 is provided, having detent mechanism "47 engaging Withthe segmentally-arrenged or fice represent different lateralpositions of adjustment of the tumbler-gears relativeto the steps of the cones The mechanism vtor rocking thextumbler mechanism for intermeshing gear-wheels-l) "with any one of the gears of the cone consists of the following instrumentalit'ies: ,49 IGPIG-R vsents a boss projecting from ,onedimb of the tumbler-frame 32 through a curveds lot 50in the side of the box. 51 represents a handle fixed to said boss 49, the free end beingprovided with detent' mechanism 52,- adapted to engage, with the segmentally-arrauged orifices 53 on the end portionot the box 1, the position 'of .these orifices 53 representing different'vertica-l steps into which the tumbles gear 40 can be brought for engaging thesame vWith-one-of [the cone ofgears. 54 represents a flange projecting from the lever, forming means for serving as a cover to the slot 50 at all times, thereby preventing dust from getting into the casing, also preventing chip- ;pingsor drillings'from getting into the same. Thus it will be seen that by the manipulation of the lever 51 the turnblcreframe is rocked,

carrying with. it the tumbler-shaft 39, with its gear 40, the projecting sleeves 33 34 of the tumbler-frame serving as'e fulcrum therefor.

.From the foregoing description it will be understood that by manipulating lever 21 The orifices "48 three different rates of driveniziy be imparted to the cone-shaft 7. By manipulating the lever46 the tumbler-gears 36 4Q canbe ad-. jus'ted laterallyupon the driven shaft 35 and tumbler-shaft 39, respectively, to bring- .the tumbler-gear 4O opposite any selected gear-Wheel of the cone, and by manipulation rocked to bring the tun1bler-gear mm ongagement with such selected gear-wheel of the cone.

Having described my invention, L claim In a variable-speeddevice, a box, a coneshaft,d1flerentd1ameter gear-wh eels thereon,

a rocking 'itumblerdrame having end hubs journaled in the casing, a second shaft journaled in saidhubs, a tumblingsl1aft supported by the swinging ends of the frame, intermeshing gear-wheels on said second. shaft and tumbling-shaft adapted to slide thereon in unison, a rock-shaft projecting through the casing and having connections for adjustably slidin' said intermeshing gearwheels onsaid s afts, one of the limbs of the tumbling-frame lying adjacent to the end wall of the box and being provided with a. boss projecting .thrdugh ascgincntal slot in said adjacent side of .the'box, and a handle attached to said bossion the outside of the box, and being provided with :detent mechanism adapted to engage with a series of segmental orifices on the outside of .the box, substantially as described. I

In testimony whereof I have hereunto set my hand. i V LOU IS 'lHIEL.

I Witnesses OLIVER B. KAISER,

, LEO ODoNNELL.

- of the lever'51 the tumbler mechanism can be 

